AD 2012-19-01
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Lycoming | Engines Reciprocating | Airworthiness Directives; Lycoming Engines Reciprocating Engines |
Unsafe Condition
Failure of the crankshaft, which will result in total engine power loss, in-flight engine failure, and possible loss of the aircraft.
Required Actions
Replace the affected crankshaft with a crankshaft that meets the requirements of Lycoming Mandatory Service Bulletin (MSB) No. 569A, dated April 11, 2006, or a crankshaft that has been inspected and found to be airworthy.
Compliance Time
Within 50 flight hours or before further flight, whichever occurs first.
Affected Aircraft
Lycoming Engines (L)O-360, (L)IO-360, AEIO-360, IO-390, AEIO-390, O-540, IO-540, AEIO-540, (L)TIO-540, IO-580, AEIO-580, and IO-720 series reciprocating engines listed by engine model number and serial number in Table 1, Table 2, Table 3, or Table 4 of Lycoming Mandatory Service Bulletin (MSB) 569A, dated April 11, 2006, and those engines with crankshafts listed by crankshaft serial number in Table 5 of Lycoming MSB 569A, dated April 11, 2006.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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